Sharpener



FIG. 1 is a front view of the sharpener.

FIG. 2 is a front side perspective view thereof, wherein the other front side perspective view would be a mirror image of that shown;

FIG. 3 is a rear view thereof;

FIG. 4 is an exploded right side view thereof with the cap removed;

FIG. 5 is a rear side perspective view thereof, the other rear side perspective view being a mirror image of that shown; and,

FIG. 6 is another rear side perspective view, rotated about 135° from that shown in FIG. 5.

The dash-dot lines represent the bounds of the claimed design, while all other broken lines are directed to environment and are for illustrative purposes only; the dash-dot lines and the broken lines form no part of the claimed design. 

I claim the ornamental design for a sharpener, as shown and described. 